Inventor · disambiguated record
William A. Callahan
Also filed as: CALLAHAN WILLIAM A
5 granted patents·92 citations·filing 1975–1976
80Inventor score
Files withUPJOHN CO5
Top patents by PatentIndex Score
5 records- 0194US4001256APyridylalkyl phenyl ureas and their n-oxidesUPJOHN CO·Filed 1975·Granted Jan 4, 1977·60 cites·11 claims
- 0281US4008326ASubstituted ureas and thioureas and pharmaceutical compositions thereofUPJOHN CO·Filed 1975·Granted Feb 15, 1977·15 cites·15 claims
- 0374US4112100AMethods of use of pyridylalkyl phenylthioureasUPJOHN CO·Filed 1975·Granted Sep 5, 1978·9 cites·25 claims
- 0463US4069224ANovel benzamidesUPJOHN CO·Filed 1975·Granted Jan 17, 1978·5 cites·29 claims
- 0548US4088766AUrea containing compositions and methodsUPJOHN CO·Filed 1976·Granted May 9, 1978·3 cites·57 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →